Page refresh after push "add to cart" button

Hi,
After i get a look to the Demo site, i decide to give it a try by myself.
But on the Demo Shop when i add a product to the cart, the cart get the update without refresh the page.

But when i do the same on my shop, the page refresh everytime, where can i change this?
(I keep on the same page allready)

RegardS.

Hello,
The solution will be to set the "Use AJAX when possible for add to cart buttons" option to YES through "Hikashop->System->Configuration->Main"